Monoecious plant of Chara shows occurrence of:
stamen and carpel of the same plant
upper antheridium and lower oogonium on the same plant
upper oogonium and lower antheridium on the same plant
antheridiophore and archegoniophore on the same plant
As we discussed in concept
Sexuality in Plants -
Plants having only one sex organ are called heterothallic or dioecious.
Plants bearing both male and female flowers on the same individual, are called monoecious
- wherein
In flowering plants, the unisexual male flower is staminate, i.e., bearing stamens, while the female if pistillate or bearing pistils. Some examples of monoecious plants are cucurbits and coconuts and of dioecious plants are papaya and date palm.
Option 1)
stamen and carpel of the same plant
This option is incorrect.
Option 2)
upper antheridium and lower oogonium on the same plant
This option is incorrect.
Option 3)
upper oogonium and lower antheridium on the same plant
This option is correct.
Option 4)
antheridiophore and archegoniophore on the same plant
This option is incorrect.